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Bridge Statistics for Sonoma, California (CA)
Condition, Traffic, Stress, Structural Evaluation, Project Costs


  • National Bridge Inventory (NBI) Statistics
  • 15Number of bridges
  • 105ft / 32.4mTotal length
  • $618,000Total costs
  • 75,178Total average daily traffic
  • 3,293Total average daily truck traffic
  • 100,166Total future (year 2036) average daily traffic
  • National Bridge Inventory (NBI) Registered Bridges for Sonoma
  • No street view available for this location

New bridges in Sonoma, CA - historical statistics
  • New bridges - historical statistics
  • 31910-1919
  • 41920-1929
  • 51960-1969
  • 21970-1979
  • 11990-1999
Reconstructed bridges in Sonoma, CA - Historical Statistics
  • Reconstructed bridges - Historical Statistics
  • 11960-1969
  • 11970-1979
  • 01980-1989
  • 11990-1999
Average Bridge Daily Traffic in Sonoma, CA
Bridge Condition - Deck
  • Bridge Condition - Deck
  • 58.3%Good
  • 41.7%Fair
Bridge Condition - Superstructure
  • Bridge Condition - Superstructure
  • 38.5%Good
  • 61.5%Fair
Bridge Condition - Substructure
  • Bridge Condition - Substructure
  • 46.2%Good
  • 7.7%Satisfactory
  • 38.5%Fair
  • 7.7%Poor
Bridge Condition - Channel
  • Bridge Condition - Channel
  • 6.7%Excellent
  • 20.0%Very good
  • 33.3%Good
  • 40.0%Satisfactory
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Structure Number: 20 0023,  Location: 04-SON-121-8.43 (Lat: 38.246128,  Lng: -122.435275),  Route carried "on" structure: State highway 121,  Year Built: 1923,  Year Reconstructed: 1967,  Status: Open,  Structure Length: 2.50m (8.20ft),  Average Daily Traffic: 19,000 (year 2016),  Truck Traffic: 7%,  Average Future Daily Traffic: 27,000 (year 2038),  Design Load: HS 15,  Features Intersected: ARROYO SECO
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 8.430,  Lanes on structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Skew: 3 degrees,  Material/Design: Concrete continuous,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 12.2m (40.0ft),  Curb-To-Curb Width: 7.5m (24.6ft),  Out-to-Out Width: 7.7m (25.3ft)

Condition: Deck: Fair,  Superstructure: Good,  Substructure: Fair,  Channel: Satisfactory,  Operating Rating: 62.2 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 37.6 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: High priority of replacement,  Waterway Adequacy: High priority of corrective action,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20 0121,  Location: 04-SON-121-8.51 (Lat: 38.246181,  Lng: -122.432700),  Route carried "on" structure: State highway 121,  Year Built: 1922,  Status: Open,  Structure Length: 0.67m (2.20ft),  Average Daily Traffic: 19,000 (year 2014),  Truck Traffic: 7%,  Average Future Daily Traffic: 27,000 (year 2037),  Features Intersected: BRANCH ARROYO SECO
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 8.510,  Lanes on structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 9.2m (30.2ft),  Skew: 3 degrees,  Material/Design: Concrete,  Design/Construction: Slab,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 6.1m (20.0ft),  Curb-To-Curb Width: 8.2m (26.9ft),  Out-to-Out Width: 8.2m (26.9ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 40.5 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 24.3 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: High priority of replacement,  Waterway Adequacy: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2020
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Structure Number: 20C0017,  Location: 0.3 MI WEST OF SR 12 (Lat: 38.265686,  Lng: -122.467572),  Route carried "on" structure: County highway ,  Year Built: 1929,  Status: Posted for load,  Structure Length: 5.18m (16.99ft),  Average Daily Traffic: 3,628 (year 2016),  Truck Traffic: 1%,  Average Future Daily Traffic: 2,095 (year 2040),  Design Load: H 15,  Features Intersected: SONOMA CREEK,  Facility Carried by Structure: WATMAUGH ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 5.8m (19.0ft),  Skew: 1 degrees,  Material/Design: Steel,  Design/Construction: Truss - Thru,  Number Of Spans In Main Unit: 1,  Number Of Approach Spans: 2,  Length of Maximum Span: 31.4m (103.0ft),  Curb-To-Curb Width: 6.8m (22.3ft),  Out-to-Out Width: 7.2m (23.6ft)

Condition: Deck: Good,  Superstructure: Fair,  Substructure: Fair,  Channel: Satisfactory,  Operating Rating: 22.0 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 13.3 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Meets minimum limits,  Deck Geometry: High priority of replacement,  Waterway Adequacy: Equal to present minimum criteria,  Approach Roadway Alignment: High priority of corrective action,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: 10.0 - 19.9% below),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: April 2020,  Critical Feature Inspection Date: April 2020,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C0171,  Location: 0.65 MI W JCT WITH SR 12 (Lat: 38.277333,  Lng: -122.472253),  Route carried "on" structure: County highway ,  Year Built: 1969,  Status: Open,  Structure Length: 7.08m (23.23ft),  Average Daily Traffic: 10,400 (year 2015),  Truck Traffic: 2%,  Average Future Daily Traffic: 4,233 (year 2036),  Design Load: HS 20+Mod,  Features Intersected: SONOMA CREEK,  Facility Carried by Structure: LEVERONI RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 12.0m (39.4ft),  Skew: 4 degrees,  Material/Design: Concrete continuous,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 27.7m (90.9ft),  Curb or Sidewalk Widths: Left: 0.1m (0.3ft),  Right: 0.1m (0.3ft),  Curb-To-Curb Width: 12.0m (39.4ft),  Out-to-Out Width: 12.2m (40.0ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Good,  Operating Rating: 57.0 metric tons,  Method Used To Determine Operating Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Inventory Rating: 40.8 metric tons,  Method Used To Determine Inventory Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 48 months,  Inspection Date: October 2018,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0209,  Location: 1.05 MI W OF SR 12 (Lat: 38.275989,  Lng: -122.477967),  Route carried "on" structure: County highway ,  Year Built: 1972,  Status: Open,  Structure Length: 2.53m (8.30ft),  Average Daily Traffic: 6,000 (year 2015),  Truck Traffic: 2%,  Average Future Daily Traffic: 7,524 (year 2040),  Design Load: HS 20,  Features Intersected: CARRIGER CREEK,  Facility Carried by Structure: LEVERONI RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 10.7m (35.1ft),  Skew: 2 degrees,  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 9.8m (32.2ft),  Curb-To-Curb Width: 10.8m (35.4ft),  Out-to-Out Width: 11.0m (36.1ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Satisfactory,  Channel: Good,  Operating Rating: 60.6 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 36.6 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0253,  Location: 0.25 MILE NORTH OF RT 12 (Lat: 38.250019,  Lng: -122.440594),  Route carried "on" structure: County highway ,  Year Built: 1968,  Status: Open,  Structure Length: 2.97m (9.74ft),  Average Daily Traffic: 1,500 (year 2018),  Truck Traffic: 6%,  Average Future Daily Traffic: 2,100 (year 2041),  Design Load: HS 20,  Features Intersected: SCHELL CREEK,  Facility Carried by Structure: 8TH ST EAST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.0m (23.0ft),  Skew: 3 degrees,  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 11.7m (38.4ft),  Curb-To-Curb Width: 12.2m (40.0ft),  Out-to-Out Width: 12.4m (40.7ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Poor,  Channel: Good,  Operating Rating: 58.0 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 35.0 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Meets minimum limits,  Deck Geometry: Better than present minimum criteria,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Length Of Structure Improvement: 2.99m (9.81ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: Febuary 2021,  Bridge Improvement Cost: $368,000,  Roadway Improvement Cost: $73,000,  Total Project Cost: $618,000 ( Estimate for 2019),  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0254,  Location: JUST EAST OF SR 12 (Lat: 38.255286,  Lng: -122.450958),  Route carried "on" structure: County highway ,  Year Built: 1970,  Status: Open,  Structure Length: 0.98m (3.22ft),  Average Daily Traffic: 100 (year 2015),  Average Future Daily Traffic: 157 (year 2040),  Features Intersected: SCHELL CREEK,  Facility Carried by Structure: SAN LUIS ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 6.7m (22.0ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 9.1m (29.9ft),  Curb-To-Curb Width: 9.8m (32.2ft),  Out-to-Out Width: 10.0m (32.8ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Fair,  Channel: Excellent,  Operating Rating: 28.8 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 17.2 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Equal to present desirable criteria,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2020,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0255,  Location: 0.5 MI E SR 12 (Lat: 38.264536,  Lng: -122.453258),  Route carried "on" structure: County highway ,  Year Built: 1920,  Year Reconstructed: 1970,  Status: Open,  Structure Length: 1.04m (3.41ft),  Average Daily Traffic: 1,000 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 3,000 (year 2040),  Features Intersected: NATHANSON CREEK,  Facility Carried by Structure: WATMAUGH ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 4.9m (16.1ft),  Skew: 3 degrees,  Material/Design: Concrete,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 10.1m (33.1ft),  Curb-To-Curb Width: 10.0m (32.8ft),  Out-to-Out Width: 10.2m (33.5ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Fair,  Channel: Satisfactory,  Operating Rating: 25.9 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 15.6 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Meets minimum limits,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2020,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C042,  Location: 0.2 MI N/O WEST 3RD ST (Lat: 38.436708,  Lng: -122.724492),  Route carried "on" structure: City street ,  Year Built: 1960,  Status: Open,  Structure Length: 3.08m (10.10ft),  Average Daily Traffic: 500 (year 2018),  Truck Traffic: 1%,  Average Future Daily Traffic: 313 (year 2041),  Features Intersected: SANTA ROSA CREEK,  Facility Carried by Structure: PIERSON ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 10.7m (35.1ft),  Curb or Sidewalk Widths: Left: 0.0m,  Right: 1.5m (4.9ft),  Curb-To-Curb Width: 8.6m (28.2ft),  Out-to-Out Width: 10.9m (35.8ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Good,  Channel: Very good,  Operating Rating: 63.8 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 38.2 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2020,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0422,  Location: AUSTIN AVE (Lat: 38.284475,  Lng: -122.456719),  Route carried "on" structure: County highway ,  Year Built: 1965,  Status: Open,  Structure Length: 0.86m (2.82ft),  Average Daily Traffic: 2,000 (year 2015),  Truck Traffic: 2%,  Average Future Daily Traffic: 3,184 (year 2038),  Features Intersected: NATHANSON CREEK,  Facility Carried by Structure: MACARTHUR STREET
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 12.2m (40.0ft),  Skew: 1 degrees,  Material/Design: Concrete,  Design/Construction: Slab,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 8.2m (26.9ft),  Curb or Sidewalk Widths: Left: 1.2m (3.9ft),  Right: 1.2m (3.9ft),  Curb-To-Curb Width: 12.2m (40.0ft),  Out-to-Out Width: 15.3m (50.2ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Good,  Channel: Good,  Operating Rating: 36.9 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 22.4 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Better than present minimum criteria,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C0458,  Location: 0.4 MI S JCT NAPA RD (Lat: 38.265703,  Lng: -122.429378),  Route carried "on" structure: County highway ,  Year Built: 1965,  Status: Open,  Structure Length: 0.79m (2.59ft),  Average Daily Traffic: 400 (year 2015),  Truck Traffic: 2%,  Average Future Daily Traffic: 448 (year 2040),  Features Intersected: ARROYO SECO,  Facility Carried by Structure: HYDE ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.0m (23.0ft),  Material/Design: Concrete continuous,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 3.7m (12.1ft)

Condition: Channel: Satisfactory,  Culverts: Satisfactory,  Operating Rating: 40.5 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 24.3 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Equal to present minimum criteria,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021
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Structure Number: 20C0491,  Location: 0.1 MI E STONY PT RD (Lat: 38.353050,  Lng: -122.739086),  Route carried "on" structure: County highway ,  Year Built: 1990,  Status: Open,  Structure Length: 1.95m (6.40ft),  Average Daily Traffic: 8,200 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 17,274 (year 2040),  Features Intersected: BELLEVUE WILFRED CREEK,  Facility Carried by Structure: ROHNERT PARK EXPWY
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 12.2m (40.0ft),  Skew: 1 degrees,  Material/Design: Concrete continuous,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 4.6m (15.1ft),  Curb or Sidewalk Widths: Left: 1.5m (4.9ft),  Right: 1.5m (4.9ft),  Curb-To-Curb Width: 12.2m (40.0ft),  Out-to-Out Width: 15.8m (51.8ft)

Condition: Channel: Very good,  Culverts: Satisfactory,  Operating Rating: 54.1 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 32.4 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 48 months,  Inspection Date: November 2020,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0495,  Location: 0.1 MI N OF E NAPA ST (Lat: 38.292508,  Lng: -122.449653),  Route carried "on" structure: City street ,  Year Built: 1914,  Status: Open,  Structure Length: 1.07m (3.51ft),  Average Daily Traffic: 2,100 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 2,654 (year 2038),  Features Intersected: NATHANSON CREEK,  Facility Carried by Structure: 4TH ST EAST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Skew: 1 degrees,  Material/Design: Concrete,  Design/Construction: Arch - Deck,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 9.1m (29.9ft),  Curb or Sidewalk Widths: Left: 1.2m (3.9ft),  Right: 1.2m (3.9ft),  Curb-To-Curb Width: 6.6m (21.7ft),  Out-to-Out Width: 10.1m (33.1ft)

Condition: Superstructure: Fair,  Substructure: Good,  Channel: Very good,  Operating Rating: 25.6 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 15.2 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Meets minimum limits,  Deck Geometry: High priority of replacement,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2021
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Structure Number: 20C0496,  Location: 0.1 MI E SR 12 SONOMA (Lat: 38.288197,  Lng: -122.457553),  Route carried "on" structure: City street ,  Year Built: 1918,  Status: Posted for load,  Structure Length: 0.98m (3.22ft),  Average Daily Traffic: 750 (year 2013),  Truck Traffic: 1%,  Average Future Daily Traffic: 1,880 (year 2038),  Features Intersected: NATHANSON CREEK,  Facility Carried by Structure: FRANCE ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 11.0m (36.1ft),  Material/Design: Concrete,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 8.2m (26.9ft),  Curb or Sidewalk Widths: Left: 1.5m (4.9ft),  Right: 1.5m (4.9ft),  Curb-To-Curb Width: 6.9m (22.6ft),  Out-to-Out Width: 10.7m (35.1ft)

Condition: Deck: Good,  Superstructure: Fair,  Substructure: Good,  Channel: Good,  Operating Rating: 25.9 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 15.6 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Meets minimum limits,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C0497,  Location: 0.1 MI E SR 12 SONOMA (Lat: 38.286447,  Lng: -122.457886),  Route carried "on" structure: City street ,  Year Built: 1910,  Year Reconstructed: 1990,  Status: Posted for load,  Structure Length: 0.73m (2.40ft),  Average Daily Traffic: 600 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 1,304 (year 2040),  Design Load: H 15,  Features Intersected: NATHANSON CREEK,  Facility Carried by Structure: CHASE ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 10.7m (35.1ft),  Material/Design: Wood or Timber,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 6.4m (21.0ft),  Curb-To-Curb Width: 7.0m (23.0ft),  Out-to-Out Width: 7.3m (24.0ft)

Condition: Deck: Good,  Superstructure: Fair,  Substructure: Fair,  Channel: Satisfactory,  Operating Rating: 21.4 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 14.6 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Meets minimum limits,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: 20.0 - 29.9% below),  Designated Inspection Frequency: Every 12 months,  Inspection Date: June 2021,  Deck Structure Type: Corrugated Steel,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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